Fix Windows zip layout and smoke path

.github/workflows/publish.yml

@@ -97,7 +97,8 @@ jobs:
           $tmp = Join-Path $env:RUNNER_TEMP ("feynman-smoke-" + [guid]::NewGuid().ToString("N"))
           New-Item -ItemType Directory -Path $tmp | Out-Null
           Expand-Archive -LiteralPath "dist/release/feynman-$version-win32-x64.zip" -DestinationPath $tmp -Force
-          & "$tmp/feynman-$version-win32-x64/feynman.cmd" --help | Select-Object -First 20
+          $bundleRoot = Join-Path $tmp "feynman-$version-win32-x64"
+          & (Join-Path $bundleRoot "feynman.cmd") --help | Select-Object -First 20
       - uses: actions/upload-artifact@v4
         with:
           name: native-${{ matrix.id }}